Person.prototype.like = 'FPS'
function Person(){
    this.name = 'Ro9nin'
        this.age = 18
}
let P = new Person()

console.log(P.like);

P.like = 'Jerk off'

console.log(P);
console.log(P.like);

delete P.like;
console.log(P.like);

// function car(){
//     this.name = '川崎H2'
// }
// let car = new Car()
// console.log(car.constructor);   // 实例对象通过constructor来记录我是由谁创建的